The MPEG format doesn't specify any file-level meta information. In lieu of this, information is extracted from the first audio and video frame headers in the file.
Tag ID Tag Name Writable Values / Notes 'Bit11-12' MPEGAudioVersion N 0 = 2.5
2 = 2
3 = 1'Bit13-14' AudioLayer N 1 = 3
2 = 2
3 = 1'Bit16-19' AudioBitrate N (version 1, layer 1)
0 = free
1 = 32000
2 = 64000
3 = 96000
4 = 128000
5 = 160000
6 = 192000
7 = 224000
8 = 256000
9 = 288000
10 = 320000
11 = 352000
12 = 384000
13 = 416000
14 = 448000
(version 1, layer 2)
0 = free
1 = 32000
2 = 48000
3 = 56000
4 = 64000
5 = 80000
6 = 96000
7 = 112000
8 = 128000
9 = 160000
10 = 192000
11 = 224000
12 = 256000
13 = 320000
14 = 384000
(version 1, layer 3)
0 = free
1 = 32000
2 = 40000
3 = 48000
4 = 56000
5 = 64000
6 = 80000
7 = 96000
8 = 112000
9 = 128000
10 = 160000
11 = 192000
12 = 224000
13 = 256000
14 = 320000
(version 2 or 2.5, layer 1)
0 = free
1 = 32000
2 = 48000
3 = 56000
4 = 64000
5 = 80000
6 = 96000
7 = 112000
8 = 128000
9 = 144000
10 = 160000
11 = 176000
12 = 192000
13 = 224000
14 = 256000
(version 2 or 2.5, layer 2 or 3)
0 = free
1 = 8000
2 = 16000
3 = 24000
4 = 32000
5 = 40000
6 = 48000
7 = 56000
8 = 64000
9 = 80000
10 = 96000
11 = 112000
12 = 128000
13 = 144000
14 = 160000'Bit20-21' SampleRate N (version 1)
0 = 44100
1 = 48000
2 = 32000
(version 2)
0 = 22050
1 = 24000
2 = 16000
(version 2.5)
0 = 11025
1 = 12000
2 = 8000'Bit24-25' ChannelMode N 0 = Stereo
1 = Joint Stereo
2 = Dual Channel
3 = Single Channel'Bit26' MSStereo N (layer 3)
0 = Off
1 = On'Bit26-27' ModeExtension N (layer 1 or 2)
0 = Bands 4-31
1 = Bands 8-31
2 = Bands 12-31
3 = Bands 16-31'Bit27' IntensityStereo N (layer 3)
0 = Off
1 = On'Bit28' CopyrightFlag N 0 = False
1 = True'Bit29' OriginalMedia N 0 = False
1 = True'Bit30-31' Emphasis N 0 = None
1 = 50/15 ms
2 = reserved
3 = CCIT J.17
Tag ID Tag Name Writable Values / Notes 'Bit00-11' ImageWidth N 'Bit12-23' ImageHeight N 'Bit24-27' AspectRatio N 1 = 1:1
'0.6735' = 0.6735
'0.7031' = 16:9, 625 line, PAL
'0.7615' = 0.7615
'0.8055' = 0.8055
'0.8437' = 16:9, 525 line, NTSC
'0.8935' = 0.8935
'0.9157' = 4:3, 625 line, PAL, CCIR601
'0.9815' = 0.9815
'1.0255' = 1.0255
'1.0695' = 1.0695
'1.095' = 4:3, 525 line, NTSC, CCIR601
'1.1575' = 1.1575
'1.2015' = 1.2015'Bit28-31' FrameRate N 'Bit32-49' VideoBitrate N